createParticles.js

var creaParticelle = function() {
  var x,y = hc/2;
  for(var i=0;i<numParticelle;i++) {
    x = Math.random()*wc;
    part[i] = new Particella(x,y, Math.random()*5.5+0.5, colori[Math.round(Math.random()*(numColori-1))]);
    part[i].setRif(x,y);
  }
}

var setup = function() {
  creaParticelle();
  c.clearRect(0, 0, wc, hc);
  c.fillStyle = "#1B2209"
  c.fillRect(0, 0, wc, hc);
}